08/09/2025
❤ HEART MURMURS EXPLAINED (AND IS ANYONE USING WEARABLES ?!) ❤
Had a lovely little client here (Cavapoo, 11yrs) who has a heart murmur and just received a mitral valve disease diagnosis, stage B2.
A heart murmur is an abnormal sound heard when listening to the heart via a stethoscope. Normal functioning hearts make that classic lub-dub sound (that's the sound of the valves in the heart closing as blood moves through the chambers).
A "murmur" is the word they use to describe a whooshing or swishing sound, caused by blood flow becoming turbulent instead of smooth (laminar).
The different grades are as follows:
Stage A is no biggie - it just means your dog is "at risk" (looking at you Cavalier King Charles Spaniel and Dachies) but no murmur or structural heart disease is yet present.
In Stage B, some murmur is present, but no clinical signs of heart failure is yet apparent.
B1: Murmur, but no heart enlargement.
B2: Murmur + echocardiographic or radiographic evidence of heart enlargement, but still no obvious outward symptoms of progression such as coughing, exercise intolerance, sometimes fainting.
In Stage C, the dog has developed clinical signs of heart failure (e.g. coughing, breathing difficulty, exercise intolerance) while stage D is said to be "end-stage disease". This is heart failure that is no longer responding well to treatment
So this little guy is Stage B2 and it's at this point vets consider starting drugs like Vetmedin as, studies show, it can significantly delay the onset of heart failure in B2 dogs. Good thing.
Its benefits include strengthening the heartbeat (by increasing the sensitivity of heart muscle fibres to calcium, I'm learning here, resulting in stronger contractions without significantly increasing oxygen demand, which is safer for the heart long-term). It also acts as a vasodilator (widens blood vessels).
Like all effective meds, I guess, there are a few downstream effects, and in this wee dog's case it's at least some digestive issues, very common they were told, but he's only a week in so the client was looking for options.
It was a short chat - I'm not a vet, so this end of things is beyond me. I directed her to my list of natural vets who can advise accordingly (www.drconorbrady .com/natural-vets).
But know there is a heap of bits that can be used here to help, top of the list being hawthorn.
Like VetMedin, hawthorn increase the efficiency of calcium handling in heart muscle cells, thereby improving contraction strength, only milder. It's also vasodilatory (enhancong nitric oxide release, which relaxes blood vessels and improves blood flow), anti-arrhythmic (potentially stabilising electrical activity in the heart, reducing ectopic beats) and is a potent antioxidant and anti-inflammatory, protecting cardiac tissue from oxidative stress, which is elevated in heart disease.
Serious win for hawthorn.
And haw is not alone in this regard. There is lots you can do in the herbal (and homoeopathic) department. For more options here, consider chatting to Rita Hogan via our new AI over on dcbholistic.com/ask-rita.
Then there are the usual heart-essential neutraceuticals that need to be ramped up - co-enzyme Q10, L-carnitine and taurine (which you can buy in supplement form or simply feed more heart meat - win for organotherapy, once again).
Again, this is not saying to avoid meds, far from it, but while other options exist, and side effects are already apparent, I'd be hoping to control the heart disease progression naturally, for as long as you can, saving the bigger guns for down the line.
Your natural vet will guide you.
The main thing I learned though, was that measuring heart murmurs is PRICEY. 💰💰💰
My client just paid £800 for the job and the (nervous) dog had to be kept in for the day (and sedated).
This needs to be done regularly to monitor disease progression.
I felt there had to be a better way.
There's lots of stuff folk can do at home, from measuring how many breaths the dog takes in a minute whlie asleep (should be under 30, anything over 30-35 is a warning, apparently) to picking up cool little blue tooth doggie stethoscopes that link to your phone (eg Stemoscope, around $99 USD).
Now, there are actual wearables hitting the market. Best so far, it seems, is the AliveCor Heart Monitor. Costing around £100 (found in Boots), these guys have been producing mobile ECG devices for humans for awhile now and for awhile there it looked like they were moving into the pet space.
It claims to attach to an iPhone, recording clinical-quality single-channel ECGs for pets. It allows heart rhythm monitoring at home, and you can share PDF results with your vet.
Pretty cool, it's just that I can no longer find them for sale.
Is anyone out there using such a device on their pet to keep an eye on things?!
[For AWESOME info on MVD in dogs check out the Cavalier King Charles queen Dr Judy over at Dr. Judy Morgan's Naturally Healthy Pets]